Elected by Voters to 2-year terms (Constitution of 1851, Art. IV, sec. 20):
1851-1853 William S. Brown
1853-1855 John M. Yingling
1855-1857 Joseph Schaeffer
1857-1859 William Wilson
1859-1861 William Segafoose (D)
1861-1863 Jeremiah Babylon
1863-1865 Joseph Ebaugh
Elected by Voters to 2-year terms (Constitution of 1864, Art. IV, sec. 49):
1865-1867 Jacob D. Hoope
Elected by Voters to 2-year terms (Constitution of 1867, Art. IV, sec. 44):
1867-1869 Thomas B. Gist
1869-1871 John Tracey
1871-1873 George N. Fringer (R)
1873-1875 Edward Devilbiss (D)
1875-1877 James W. White
1877-1879 Peter Woods (D)
1879-1881 George N. Fringer (R)
1881-1883 S. Carr Wickert
1883 E. M. Fuhrman
1883-1885 George A. Shriver, Esq.
1885-1887 John T. Lynch
1887-1889
1889-1891 S. Carr Wickert
1891-1893
1893-1895 Elias B. Arnold
1895-1897 J. Oliver Murray (D)
1897-1899 Ephriam Haines
1899-1901 George W. Motter
1901-1903 Francis A. Crawford (D)
1903-1905 William H. Wilson
1905-1907 Joseph L. Franklin
1907-1909 Jeremiah B. Townshend (R)
1909-1911 Benjamin D. Kemper (R)
1911-1913 Elias N. Davis
1913-1915 Albert L. Davis
1915-1917 James M. Stoner
1917-1919 Edwin M. Mellor, Jr.
1919-1921 William Bloom
1921-1923 E. Edward Martin
1923-1926 William T. Phillips
Elected by Voters to 4-year terms (Constitution of 1867, Art. XVII; added by Chapter 227, Acts of 1922, ratified Nov. 7, 1922):
1926-1930 George C. Fowble
1930-1934 Ray Yohn (D)
1934-1938 Joseph A. Shipley
1938-1942 Walter L. Shipley (R)
1942-1946 Charles W. Conaway (D)
Elected by Voters to 4-year terms (Constitution of 1867, Art. IV, sec. 44, amended by Chapter 786, Acts of 1945, ratified Nov. 5, 1946):
1946-1954 J. Wesley Mathias, Jr.
1954-1958 William M. Buckingham
1958-1962 Charles C. Conaway (D)
1962-1982 H. LeRoy (Monk) Campbell (R)
1982-1990 Grover N. Sensabaugh (D)
1990-1998 John H. Brown (R)
1998-2014 Kenneth L. Tregoning (R)
2014- James T. DeWees (R)
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